Some hair brands begin in a lab. Number 4 began somewhere more unusual: at the meeting point of fashion, science, art, music and industrial design. It is California clean beauty built to perform like a salon backbar, with plant-based actives doing the work that harsh chemistry used to.
The result is a range that earns its place on a fashion shoot and in your bathroom equally. Clean formulas, a finish that reads expensive because the formulation is genuinely good, and an ingredient list you can actually read. Founded as a multisensory, high-performance idea, Number 4 treats hair care as craft rather than commodity.
Here is the complete guide: what makes the brand tick, the collections decoded, a simple routine, and why it suits hair living through a Cyprus summer.
What makes Number 4 "high performance"
The phrase is in the name for a reason. Number 4 is built around plant-based actives and clean formulation, without leaning on the harsh chemistry that strips and dulls hair over time. The brief was simple and demanding at once: salon-grade results from a cleaner ingredient list.
Clean, not compromised. Formulas are designed to nourish and protect, so hair looks healthier the longer you use them rather than more dependent.
Plant-based actives. Botanical ingredients carry the workload, chosen for performance first, marketing second.
Designed like an object. The collections were created in alignment with the cycles of fashion, science, art, music and industrial design, which is why the bottles look considered and the formulas feel premium.
The Number 4 collections, decoded
Number 4 organises its hair care into named collections, each built around a clear job. Here are the ones we carry in Cyprus.
L'eau de Mare: Hydrate
The hydration line for dry, dehydrated or colour-treated hair. The Hydrating Shampoo cleanses gently without stripping, and the Hydrating Conditioner smooths and softens. This is the pairing for hair that drinks up moisture and still wants more, which in a dry Mediterranean climate is most of us.
Fleurs de Temps: Volume
Lightweight body for fine or flat hair. The Volumizing Shampoo and Volumizing Conditioner lift from the root and add fullness without the heavy, coated feeling that weighs fine hair down.
Lumière d'hiver: Reconstruct
The repair step. The Reconstructing Hair Masque is an intensive weekly treatment that rebuilds dry, damaged and over-worked hair, restoring strength, softness and elasticity. If heat tools, colour and sun have left your ends fragile, this is where to start.
Daily Clarifying
A reset for product buildup, oil and hard-water residue, without the squeaky over-drying that clarifiers are known for. The Daily Clarifying Shampoo earns a special mention in Cyprus, where hard water leaves mineral deposits on the hair shaft. More on that below.
Styling and finishing
The styling shelf covers prep through finish: the Thermal Styling Spray shields hair before heat, the Blow Dry Lotion builds smooth body, and the Smoothing Hair Balm tames frizz on humid days. For texture and hold, reach for the Texture Styling Crème, Sugar Texturizing Spray, Styling Foam or the Non-Aerosol Hair Spray for a flexible, brushable finish.
How to build a Number 4 routine
A complete Number 4 routine is four simple steps. Match the shampoo and conditioner to your hair's main need, treat weekly, and finish with the right styler.
- Cleanse. Choose your shampoo by need: Hydrating for dry or colour-treated hair, Volumizing for fine hair, Daily Clarifying when buildup or hard water dulls the hair.
- Condition. Follow with the matching conditioner through mid-lengths and ends. Leave for one to two minutes, then rinse.
- Treat. Once or twice a week, swap the conditioner for the Reconstructing Hair Masque to rebuild strength and softness.
- Style. Mist Thermal Styling Spray before heat, then finish with a styler suited to your look, from smoothing balm to texturizing spray.
Number 4 for Cyprus hair
Cyprus is hard on hair, and not in one way. The water is hard across most of the island, leaving calcium and magnesium deposits that dull colour and roughen the cuticle. Summer adds relentless UV, salt from the sea, and humidity that swells the hair and triggers frizz. Clean, gentle formulas matter more here, not less, because hair is already under pressure from the environment.
This is where Number 4's structure helps. The Daily Clarifying Shampoo lifts mineral residue from hard water so your other products can actually work. The Hydrate collection puts moisture back after sun and salt. The Smoothing Hair Balm and finishing sprays manage the humidity frizz that defines a Cyprus summer. For the full picture on island water, read our guide to hard water hair care in Cyprus, and our ultimate guide to hair care in Cyprus.
Which Number 4 is right for you
Start with your hair's main concern, then build out from there. Knowing your hair's porosity helps too, which we cover in our porosity guide.
| Your hair | Start with |
|---|---|
| Dry, dehydrated or colour-treated | Hydrating Shampoo + Conditioner |
| Fine or flat, wants lift | Volumizing Shampoo + Conditioner |
| Dull, weighed down by buildup or hard water | Daily Clarifying Shampoo |
| Damaged, fragile, over-processed | Reconstructing Hair Masque |
| Frizz-prone in humidity | Smoothing Hair Balm + Thermal Styling Spray |
Frequently asked questions
What is Number 4 hair care?
Number 4 is a California clean-beauty hair care brand built on plant-based actives and high-performance, salon-grade formulation, designed at the intersection of fashion, science, art, music and industrial design.
Is Number 4 good for colour-treated or dry hair?
Yes. The L'eau de Mare hydration collection cleanses gently and restores moisture, which suits dry, dehydrated and colour-treated hair, while the Daily Clarifying Shampoo removes buildup without over-drying.
Where can I buy Number 4 in Cyprus?
Number 4 is available at WOOP with delivery across Cyprus.
Shop Number 4 in Cyprus
WOOP carries Number 4 with delivery across Cyprus. Free shipping on orders over €50. Everything we carry at WOOP is 100% genuine, sourced through official professional distribution, and tested by stylists who use it on real clients daily.
Browse the full Number 4 collection →
Trusted by HAIR ETC Studio, the highest-rated salon in Cyprus. Read more from the WOOP team on our blog.
